Stylus for phonograph reproducers



May 15, 1923. 1,454,951

r J. A. BROWN STYLUS FOR PHONOGRAPH REPRODUCERS Filed Auz. 13 1921 ai'weutot juir'usfl Bro 351 7718 flbtomm Patented ay 15, 1923, I

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arena STYLUS FOR PHONOGRAPH REPRODUCERS.

Application filed August 13, 1921. Serial No. 491,971.

T all whom it may concern Be it known that I, JULIUS A. BROWN,

a native of Austria, and who has applied for citizenship of the United States of America, and a resident of Peekskill, in the county of Westchester and State of New York, have invented certain new and useful Improvements in Styli for Phonograph Reproducers, of which the following is a specification.

This invention relates to a sound box for a phonograph that can be used as a reproducer, or as a recorder and relates particu larly to a novel form of stylus for the sound box.

The object of thisinvention is to provide an improved form of stylus or vibrating arm, that is connected between the dia phragm and the needle,- that will have the effect to balance the vibration and. whereby greatly improved results are'obtained.

In the accompanying drawing showing one embodiment of my invention, Figure l is a plan view of a sound box carrying the stylus. Fig. 2 is a side elevation partly in section.

Fig. 3 is a front elevation. Fig. 4 is. a rear elevation, and Fig. 5 a side elevation, of the stylus detached.

Fig. 6 is a perspective view of the stylus. In Figs. 1 and 2 I show a conventional form of sound box or reproducer, having a casing 2 of conical form, with a rear outlet, 3, and a diaphragm 4; at the larger open end.

The stylus comprises essentially a bracket portion and an arm. The bracket portion may be of the conventional type, comprising a hinge portion 5, pivoted between arms 6 on the frame to vibrate. From this extends a stem 7 having a block 8 in which the usual needle is secured. As stated these parts may be of the usual or any preferred form but the arm 9 is in the form of a strip or plate having two tapered portions, and

connected with a small rodlO at the outer end. The plate 9. has its outer face 1]. inclined to the inner edge 12, near the free end, the

edge 11' extending back in a straight line nearly to the inner end when it extends 1 and connected therewith by an inclined 1301'".

The inuerend connects 1 tion 15 as shown.

directly with the part 16 of the bracket At the outer end the rod or wire lO eX- tends preferably inthe form of a half circle with the end 17 extended inwardly, and. screw threaded to .ca-rrynuts, for clamp-' ing at the central hole in the diaphragm, as shown in Fig. 2.

This stylus will vibrate in the arm in the usual manner when the sound waves are im parted tothe diaphragm. It will be seen that the stylus bar which is in the form of a flat plate is composed of two tapered por tions that converge from the outer vibrating end, there being a converging portion, then a reduced middle portion, and then another converging portioni It has been found by repeated experiments that a construction of this character improves the vibration and eliminates objectionable sounds. The arm can be made integral with theybracket, if desired, or

suitably secured thereto, the wire or rod 10 is also preferably integral with the flat plate.

What I claim is z A stylus arm for a sound box, comprising a plate having 1 portion converging from the inner end outwardly to an intermediate portion, thereupon having a reduced portion, and then again converging from the reduced portion toward the outer end.

Signed at N. Y. city, N. Y., on August 9,

. *JULIUS BROWN. 

